Having very good experience with solving nonlinear partial differential equation analytically and numerically using different mathematical techniques (Finite Differences, Finite Elements, Finite Volumes, …) and the modelling of nano and micro devices (Solar cells, Sensors, Transistors, ,..) Moreover, I have a good knowledge with charge transport phenomena and quantum mechanics such as ballistic transport, scattering transport, quantum open systems, quantum dots, Plasmonic. I enclosed in my studies different nonlinear physical and electrical effects for micro and nano-devices; transport coefficients in semiconductors; morphology impact on solar cells structures; interface traps in power transistors. The development of new approaches to study the assessment of optical (absorption) degradation at deep submicron level of photovoltaic and optoelectronic devices using analytical models is also concerned. Currently, I try to extend my work to perovskite, kesterite and organic solar cell through studying quantum transport, the nonlinear phenomena and their stability in the presence of applied electric field and charge trapping.